AVR32DD28-I/STX

Overview

The AVR32DD28-I/STX is an 8-bit microcontroller from the AVR DD family, featuring a 24 MHz AVR CPU with hardware multiplier. It includes 32 KB of Flash memory, 4 KB of SRAM, and 256 bytes of EEPROM. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports industrial temperatures from -40°C to +85°C. Key peripherals include a 12-bit ADC, 10-bit DAC, Zero-Cross Detector (ZCD), two USARTs, SPI, TWI/I2C, Event System, and Configurable Custom Logic. It utilizes Multi-Voltage I/O (MVIO) on Port C and is housed in a 28-pin VQFN package.

Feature Summary

• Multi-Voltage I/O (MVIO) capability enables true level-shifted bidirectional communication between different power domains without external level shifters.
• Integrated intelligent analog features including a 12-bit differential ADC, 10-bit DAC, Analog Comparator, and Zero-Cross Detector for precise signal processing.
• Advanced digital peripherals such as the Event System and Configurable Custom Logic reduce system latency and CPU load by enabling independent peripheral signaling.
• Low-power architecture with three sleep modes (Idle, Standby, Power-Down) and multiple clock options including auto-tuning oscillators.

Applications

• Industrial control systems requiring multi-voltage domain interfacing
• Smart home appliances and IoT devices needing real-time control
• Automotive applications utilizing zero-cross detection for motor or lighting control
• Consumer electronics requiring efficient analog-to-digital conversion

Procurement Notes

Verify the specific ordering suffix 'I' confirms the industrial temperature range (-40°C to +85°C). Confirm the 'STX' suffix corresponds to the 28-pin VQFN package type. Ensure compatibility with your design's voltage requirements, as the device supports 1.8V to 5.5V operation. Check that the required peripheral count matches the 28-pin variant specifications.

Selection Notes

Select this component when vertical migration within the AVR DD family is required without code modification. Choose this part if Multi-Voltage I/O functionality is necessary to interface with components operating at different voltage levels. Consider this MCU for designs needing a balance of processing speed up to 24 MHz and rich analog/digital peripheral integration in a compact 28-pin footprint.

Part Context

The AVR32DD28-I/STX belongs to the AVR DD family, which emphasizes low-power performance and intelligent peripherals. This family allows for easy horizontal and vertical migration across pin counts and memory sizes while maintaining full pin and feature compatibility. The device leverages the latest AVR CPU technology with single-cycle I/O access and a hardware multiplier.

Replacement Considerations

Other members of the AVR DD family, such as AVR32DD20 or AVR32DD32, offer pin-compatible alternatives with varying memory sizes or pin counts. Verify that the substitute part number meets the same temperature grade and package requirements.